Speaker
Description
Rare-earth iron garnets are known examples of Néel ferrimagnetism. Polycrystalline terbium iron garnet (Tb3Fe5O12, or TbIG) exhibits a net electron polarization and zero internal magnetization at its compensation temperature $T_c$, and the NSR-Ferrimagnets Collaboration has used this polarized electron target to search for exotic spin-dependent interactions between polarized electrons and polarized neutrons. We will describe the development and initial characterization of the TbIG target as well as the neutron polarimetry techniques used in our ongoing search for these exotic interactions. The most recent efforts at the HFIR CG-1D MARS neutron imaging beamline in June 2024 will be discussed, including a description of the apparatus as well as data analysis of spin-state asymmetries in neutron imaging data and preliminary results.
